Union boss Bernard Moffatt says he's angry over the lack of information being passed on by BA Connect and FlyBe.
Workers at the aircraft maintenance facility in Ronaldway claim they've been told there will be large redundancies.
However, Flybe Chief Executive, Mike Rutter, says no decision over its future have been made yet and BA has remained silent.
Mr Moffatt says he's disgusted at the treatment of staff:
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